Mystery gives curiosity somewhere to keep walking.

If everything were settled, curiosity would have nowhere left to go. The unresolved questions are what keep the walking possible: they give attention a direction and make the next thing worth learning. Mystery is not a deficiency in your knowledge but the open ground that any further understanding has to be built on.

Keep a couple of questions you cannot answer somewhere you will see them. Return to one occasionally without pressure to close it. The point is not to solve them this year but to have somewhere to keep going, which is what makes a mind stay alive over decades rather than settling.